AC rotating machine with improved drive for its stator coil
a technology of ac rotating machines and stator coils, which is applied in the direction of motor/generator/converter stoppers, electronic commutators, dynamo-electric converter control, etc., can solve the problems of increasing the total manufacturing cost of the apparatus, complicated structure of the inverter circuit installed in the apparatus for applying the three-phase ac voltage to the synchronous motor, and limited electric power of the device, so as to improve the reliability of the ac rotating machines
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first embodiment
[0036]An example of the structure of an AC motor system 50 according to the first embodiment of the present invention is illustrated in FIG. 1. Referring to FIG. 1, the AC motor system 50 includes a three-phase synchronous motor 1, an inverter circuit 2, a motor controller 3, a direct current (DC) power source 4, and a plurality of drivers 5.
[0037]The three-phase synchronous motor, referred to simply as “synchronous motor”, 1 is designed to be driven by AC voltages. For example, a synchronous reluctance motor or a permanent magnet synchronous motor can be used as the three-phase synchronous motor 1.
[0038]When the synchronous motor 1 is installed in a hybrid vehicle, it is directly or indirectly coupled to a crankshaft of an engine installed in the hybrid vehicle, and serves as a power source together with the engine. When the synchronous motor 1 is installed in an electric vehicle, it serves as a power source of the electric vehicle.
[0039]When the synchronous motor 1 is a three-phas...
second embodiment
[0157]An AC motor system 50A according to the second embodiment of the present invention will be described hereinafter with reference to FIG. 6.
[0158]The structure of the AC motor system 50A according to the second embodiment is substantially identical to that of the AC motor system 50 according to the first embodiment except for the following different points. So, like parts between the AC motor systems 50 and 50A according to the first and second embodiments, to which like reference characters are assigned, are omitted or simplified in description.
[0159]In addition to the components of the AC motor system 50, the AC motor system 50A includes a star-connected stator coil 110, a three-phase inverter 200, a motor controller 300, a DC power source 400, and a plurality of drivers 500.
[0160]The star-connected stator coil 110 consists of a U-phase winding 111, a V-phase stator winding 112, and a W-phase stator winding 113. The three-phase windings 111, 112, and 113 are wound in the slots...
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